Finding the Fourth Proportional to 123,090.10, 184,635.15 and 83,724.10

Step by Step Solution

1. Step 1: Write the proportion equation
   123,090.10 : 184,635.15 = 83,724.10 : x
2. Step 2: Convert to fraction form
   123,090.10/184,635.15 = 83,724.10/x
3. Step 3: Cross multiply
   123,090.10x = 184,635.15 × 83,724.10
4. Step 4: Simplify right side
   123,090.10x = 15,458,411,762.12
5. Step 5: Solve for x
   x = 15,458,411,762.12/123,090.10
6. Step 6: Final answer
   x = 125,586.15